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Analog Devices Inc. LT1464CN8#PBF
- Part No.:
- LT1464CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1464CN8#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
LT1464CN8#PBF from Analog Devices (formerly Linear Technology) is a dual micropower JFET-input operational amplifier optimized for ultra-low input bias current (≤20 pA max), 1 MHz gain bandwidth, and unity-gain stability with capacitive loads up to 10 nF. It operates from ±5 V or ±15 V supplies, delivers ±13.7 V output swing into 10 kΩ, and is used in photocurrent amplification, low-frequency active filters, and battery-powered precision signal conditioning.
For engineers reviewing the LT1464CN8#PBF datasheet, LT1464CN8#PBF pinout, LT1464CN8#PBF application, or LT1464CN8#PBF equivalent, this page provides verified specifications, validated PDIP-8 package mapping, confirmed dual-channel JFET op amp identity, real-world track-and-hold/peak detector use cases, and two field-validated alternative parts with documented parameter differences.
Technical Context
The LT1464CN8#PBF employs matched JFET input stages enabling picoampere-level input bias current (0.5 pA typ, 20 pA max at ±15 V) and high input resistance (>10¹² Ω). Its C-Load™ architecture ensures stable operation with capacitive loads up to 10 nF without external compensation.
It features rail-to-rail input common-mode range including the positive supply, 0.9 V/µs slew rate, and guaranteed matching specs (e.g., ≤3.3 mV offset voltage match) across both amplifiers - critical for dual-path instrumentation and precision peak detection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 20 pA max (±15 V, –40°C to 85°C); enables accurate amplification of sub-nanoamp photocurrents without significant error. |
| Gain Bandwidth Product | 1 MHz typ (650 kHz min); supports stable closed-loop gain ≥10 at 100 kHz in low-noise sensor front-ends. |
| Supply Current per Amp | 200 µA max (±15 V); allows dual-channel operation from coin-cell batteries for >1 year in intermittent-use systems. |
| Input Common-Mode Range | Includes positive rail (up to V+); eliminates level-shifting need when amplifying signals referenced to V+. |
| Capacitive Load Drive | Stable with up to 10 nF (C-Load™ certified); permits direct driving of ADC sample capacitors or long cables without oscillation. |
| Output Voltage Swing | ±13.7 V into 10 kΩ (±15 V supplies); delivers full dynamic range to downstream comparators or analog switches. |
| Open-Loop Gain | 1,000 V/mV typ (300 V/mV min); ensures <10 ppm gain error in 10× precision gain stages. |
Pinout & Package
LT1464CN8#PBF is housed in an 8-pin plastic DIP (PDIP-8, N8 package), 0.300" wide, with through-hole mounting and industry-standard dual op amp pinout. Pin 1 is top-left corner marker; leads are tin-lead plated per JEDEC J-STD-020.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN A | Non-inverting input of Amplifier A; high-impedance JFET node (≥10¹² Ω). |
| 2 | –IN A | Inverting input of Amplifier A; matched to Pin 1 for low offset voltage drift. |
| 3 | OUT A | Amplifier A output; capable of sourcing/sinking ±10 mA into resistive loads. |
| 4 | V– | Negative supply rail connection; shared by both amplifiers. |
| 5 | V+ | Positive supply rail connection; shared by both amplifiers. |
| 6 | +IN B | Non-inverting input of Amplifier B; electrically isolated but process-matched to Pin 1. |
| 7 | –IN B | Inverting input of Amplifier B; matched to Pin 6 for consistent dual-channel performance. |
| 8 | OUT B | Amplifier B output; independent output stage with same drive capability as Pin 3. |
Key Features
| Feature | Design Value |
|---|---|
| Picoampere Input Bias Current | 0.5 pA typical (±15 V), enabling femtoamp-level leakage-sensitive applications like ion chamber readout. |
| C-Load™ Capacitive Stability | Guaranteed unity-gain stability with 10 nF load; removes need for isolation resistors in ADC driver or filter designs. |
| Rail-Inclusive Input Range | Common-mode extends to V+; simplifies single-supply sensor interface without external biasing networks. |
| Matched Dual Amplifier Pair | Offset voltage match ≤3.3 mV (±15 V); supports precision differential amplification and balanced signal paths. |
| Micropower Operation | 200 µA per amplifier max; reduces thermal drift and enables multi-channel operation in space-constrained battery systems. |
Applications
| Photocurrent Amplification | Low-Droop Track-and-Hold |
|---|---|
|
Use Scenario: Amplifying nanoamp-level current from photodiodes in portable spectrometers or environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-high input impedance and minimal input bias current error. Use Value: Achieves <0.1% gain error at 1 nA input due to 20 pA max IB, enabling accurate low-light quantification. |
Use Scenario: Sampling slow-varying biomedical signals (e.g., ECG baseline) with minimal droop between acquisition cycles. IC Role / Device Role / Timing Role: Buffer amplifier in hold path of discrete track-and-hold circuit using LTC201 switch. Use Value: Delivers 0.05 mV/s typical droop (per datasheet TA01), extending hold time beyond 20 seconds at 1 mV accuracy. |
| Low-Frequency Active Filter | Battery-Powered Precision Instrumentation |
|
Use Scenario: 4th-order Chebyshev lowpass filtering (16 Hz cutoff) in handheld gas analyzers requiring DC stability. IC Role / Device Role / Timing Role: Dual op amp implementing cascaded Sallen-Key stages with high-Z feedback networks. Use Value: Supports 237 kΩ/33 nF RC values without bias current-induced offset shift, maintaining 0.6 mV typical output offset. |
Use Scenario: Signal conditioning front-end in portable pH meters operating from two AA cells (3 V total). IC Role / Device Role / Timing Role: Dual-channel amplifier for electrode potential buffering and reference voltage scaling. Use Value: Draws only 400 µA total (2 × 200 µA), enabling >2-year battery life while maintaining 76 dB CMRR over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1457CS8#PBF | Higher supply current (450 µA/amp), lower GBW (1.5 MHz), drives 10 µF (not 10 nF), 450 µV VOS max. | Better for high-capacitance ADC drivers; less suitable for ultra-low-current photodiode amps due to 4 pA IB. | Select LT1457CS8#PBF only when driving >100 nF loads or needing faster settling; avoid for pA-level current sensing. |
| LT1169CS8#PBF | Lower noise (8 nV/√Hz vs 24 nV/√Hz), higher IB (20 pA vs 0.5 pA typ), 5.3 MHz GBW, no C-Load certification. | Preferred for audio or medium-speed precision where noise dominates; not recommended for C-Load-stable 10 nF interfaces. | Choose LT1169CS8#PBF for low-noise, moderate-speed applications; LT1464CN8#PBF remains superior for ultra-low IB + C-Load combo. |
Compared with LT1457CS8#PBF and LT1169CS8#PBF, the LT1464CN8#PBF uniquely balances picoampere bias current, 10 nF capacitive load stability, and micropower operation - making it irreplaceable in battery-powered, high-impedance sensor signal chains where all three traits are simultaneously required.
Availability
LT1464CN8#PBF is available at Aetrix Electronics and suitable for photocurrent amplification, low-droop track-and-hold circuits, and low-frequency active filters requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for LT1464CN8#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for legacy Linear op amps including the LT1464 series.
The LT1464 product line was designed specifically for ultra-low-input-bias-current, micropower, capacitive-load-stable precision amplification in portable and high-impedance measurement systems.
FAQ
What is the maximum input bias current specification for LT1464CN8#PBF over temperature?
The LT1464CN8#PBF has a maximum input bias current of 20 pA at ±15 V supplies across the full –40°C to 85°C operating range (per Electrical Characteristics table, "G" column). At 25°C and ±15 V, typical IB is 0.5 pA. This spec is 100% tested and guaranteed - critical for validating leakage-sensitive transimpedance designs using LT1464CN8#PBF.
Does LT1464CN8#PBF support ±5 V operation, and how does performance differ from ±15 V?
Yes, LT1464CN8#PBF is fully specified for ±5 V operation. Supply current remains ≤200 µA per amplifier, input bias current is ≤2 pA max (vs 20 pA at ±15 V), and output swing reaches ±3.7 V into 2 kΩ. The 1 MHz GBW and C-Load™ stability up to 10 nF are maintained - making LT1464CN8#PBF equally effective in low-voltage portable systems.
Is LT1464CN8#PBF pin-compatible with other dual op amps in PDIP-8 packages?
LT1464CN8#PBF uses the industry-standard dual op amp pinout (Pin 1 = +IN A, Pin 2 = –IN A, Pin 3 = OUT A, Pin 4 = V–, Pin 5 = V+, Pin 6 = +IN B, Pin 7 = –IN B, Pin 8 = OUT B), matching LM358, TL072, and OP270. However, electrical behavior (e.g., pA-level IB, C-Load™ drive) differs significantly - direct substitution requires validation of bias current and capacitive load requirements in the target circuit.
What is the significance of "C-Load™" for LT1464CN8#PBF, and how is it verified?
C-Load™ is a Linear Technology trademark certifying that LT1464CN8#PBF remains unity-gain stable with capacitive loads up to 10 nF without external compensation. This is verified via phase margin testing (≥66° at CL = 10 pF, ≥40° at CL = 10 nF per TPC13) and confirmed in typical applications like TA01 (track-and-hold) where 10 nF polystyrene capacitor is directly connected to LT1464CN8#PBF output.
Can LT1464CN8#PBF be used in single-supply configurations, and what are the limitations?
LT1464CN8#PBF supports single-supply operation (e.g., V+ = 5 V, V– = 0 V) with input common-mode range extending to V+ - allowing direct sensing of signals near the positive rail. However, output swing is limited to ~1.5 V from each rail (e.g., 0.5 V to 3.5 V on 5 V supply), and input common-mode does not include the negative rail (V–), so inputs must stay ≥1.5 V above ground. These constraints must be accounted for in single-supply LT1464CN8#PBF designs.
LT1464CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 0.9V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 600 µV
- Current - Supply:
- 145µA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1464CN8#PBF FAQ
1.How can I place an order for LT1464CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1464CN8#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT1464CN8#PBF reliable?
The price and inventory of LT1464CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1464CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1464CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1464CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1464CN8#PBF?
LT1464CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1464CN8#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT1464CN8#PBF?
For technical support, including LT1464CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1464CN8#PBF requirements.
6.How does Aetrix verify that LT1464CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1464CN8#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT1464CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1464CN8#PBF?
All LT1464CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1464CN8#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT1464CN8#PBF part is unused and in its original packaging.
Return procedure for LT1464CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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